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/*
* Copyright (C) 2014 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authored by: Andrea Azzarone <andrea.azzarone@canonical.com>
*/
#include "SuspendNotifier.h"
#include <NuxCore/Logger.h>
#include "UnityCore/GLibDBusProxy.h"
namespace unity
{
namespace lockscreen
{
DECLARE_LOGGER(logger, "unity.lockscreen.suspendnotifier");
//
// Private Implementation
//
class SuspendNotifier::Impl
{
public:
Impl();
~Impl();
bool RegisterInterest(SuspendCallback const& cb);
void UnregisterInterest();
void Inhibit();
void Uninhibit();
bool IsInhibited() const;
private:
std::shared_ptr<glib::DBusProxy> logind_proxy_;
SuspendCallback cb_;
gint delay_inhibit_fd_;
};
SuspendNotifier::Impl::Impl()
: logind_proxy_(std::make_shared<glib::DBusProxy>("org.freedesktop.login1",
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
G_BUS_TYPE_SYSTEM))
, delay_inhibit_fd_(-1)
{}
SuspendNotifier::Impl::~Impl()
{
UnregisterInterest();
}
bool SuspendNotifier::Impl::RegisterInterest(SuspendCallback const& cb)
{
if (!cb or cb_)
return false;
cb_ = cb;
Inhibit();
logind_proxy_->Connect("PrepareForSleep", [this](GVariant* variant) {
bool active = glib::Variant(variant).GetBool();
if (active) // suspending
{
cb_();
Uninhibit();
}
else // resuming
{
Inhibit();
}
});
return true;
}
void SuspendNotifier::Impl::UnregisterInterest()
{
Uninhibit();
logind_proxy_->DisconnectSignal("PrepareForSleep");
cb_ = nullptr;
}
void SuspendNotifier::Impl::Inhibit()
{
if (IsInhibited())
return;
GVariant* args = g_variant_new("(ssss)", "sleep", "Unity Lockscreen", "Unity wants to lock screen before suspending.", "delay");
logind_proxy_->CallWithUnixFdList("Inhibit", args, [this] (GVariant* variant, glib::Error const& e) {
if (e)
{
LOG_ERROR(logger) << "Failed to inhbit suspend";
}
delay_inhibit_fd_ = glib::Variant(variant).GetInt32();
});
}
void SuspendNotifier::Impl::Uninhibit()
{
if (!IsInhibited())
return;
close(delay_inhibit_fd_);
delay_inhibit_fd_ = -1;
}
bool SuspendNotifier::Impl::IsInhibited() const
{
return delay_inhibit_fd_ != -1;
}
//
// End Private Implementation
//
SuspendNotifier::SuspendNotifier()
: pimpl_(new(Impl))
{}
SuspendNotifier::~SuspendNotifier()
{}
bool SuspendNotifier::RegisterInterest(SuspendCallback const& cb)
{
return pimpl_->RegisterInterest(cb);
}
void SuspendNotifier::UnregisterInterest()
{
pimpl_->UnregisterInterest();
}
}
}
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